Home / 145,109.19-200,239.71-81,434.69

Finding the Fourth Proportional to 145,109.19, 200,239.71 and 81,434.69

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Solution

The fourth proportional to 145,109.19, 200,239.71 and 81,434.69 is: 112,373.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,109.19 : 200,239.71 = 81,434.69 : x
  2. Step 2: Convert to fraction form
    145,109.19/200,239.71 = 81,434.69/x
  3. Step 3: Cross multiply
    145,109.19x = 200,239.71 × 81,434.69
  4. Step 4: Simplify right side
    145,109.19x = 16,306,458,709.54
  5. Step 5: Solve for x
    x = 16,306,458,709.54/145,109.19
  6. Step 6: Final answer
    x = 112,373.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.